From 1c3e36309fe2e94b8a889fa32cb5c871434f8ed6 Mon Sep 17 00:00:00 2001 From: Bartosz Golaszewski Date: Wed, 31 May 2017 18:06:59 +0200 Subject: [PATCH] irq/generic-chip: Provide devm_irq_alloc_generic_chip() Provide a resource managed variant of irq_alloc_generic_chip(). Signed-off-by: Bartosz Golaszewski Signed-off-by: Thomas Gleixner Acked-by: Marc Zyngier Cc: linux-doc@vger.kernel.org Cc: Jonathan Corbet Link: http://lkml.kernel.org/r/1496246820-13250-5-git-send-email-brgl@bgdev.pl --- Documentation/driver-model/devres.txt | 1 + include/linux/irq.h | 5 ++++ kernel/irq/devres.c | 34 +++++++++++++++++++++++++++ 3 files changed, 40 insertions(+) diff --git a/Documentation/driver-model/devres.txt b/Documentation/driver-model/devres.txt index e72587fe477d..d473be8c8781 100644 --- a/Documentation/driver-model/devres.txt +++ b/Documentation/driver-model/devres.txt @@ -311,6 +311,7 @@ IRQ devm_irq_alloc_desc_at() devm_irq_alloc_desc_from() devm_irq_alloc_descs_from() + devm_irq_alloc_generic_chip() LED devm_led_classdev_register() diff --git a/include/linux/irq.h b/include/linux/irq.h index dc63aa10ce70..64ae54673e08 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -958,6 +958,11 @@ int irq_setup_alt_chip(struct irq_data *d, unsigned int type); void irq_remove_generic_chip(struct irq_chip_generic *gc, u32 msk, unsigned int clr, unsigned int set); +struct irq_chip_generic * +devm_irq_alloc_generic_chip(struct device *dev, const char *name, int num_ct, + unsigned int irq_base, void __iomem *reg_base, + irq_flow_handler_t handler); + struct irq_chip_generic *irq_get_domain_generic_chip(struct irq_domain *d, unsigned int hw_irq); int __irq_alloc_domain_generic_chips(struct irq_domain *d, int irqs_per_chip, diff --git a/kernel/irq/devres.c b/kernel/irq/devres.c index 1613bfd48365..21ee0aebccfb 100644 --- a/kernel/irq/devres.c +++ b/kernel/irq/devres.c @@ -4,6 +4,8 @@ #include #include +#include "internals.h" + /* * Device resource management aware IRQ request/free implementation. */ @@ -198,3 +200,35 @@ int __devm_irq_alloc_descs(struct device *dev, int irq, unsigned int from, return base; } EXPORT_SYMBOL_GPL(__devm_irq_alloc_descs); + +#ifdef CONFIG_GENERIC_IRQ_CHIP +/** + * devm_irq_alloc_generic_chip - Allocate and initialize a generic chip + * for a managed device + * @dev: Device to allocate the generic chip for + * @name: Name of the irq chip + * @num_ct: Number of irq_chip_type instances associated with this + * @irq_base: Interrupt base nr for this chip + * @reg_base: Register base address (virtual) + * @handler: Default flow handler associated with this chip + * + * Returns an initialized irq_chip_generic structure. The chip defaults + * to the primary (index 0) irq_chip_type and @handler + */ +struct irq_chip_generic * +devm_irq_alloc_generic_chip(struct device *dev, const char *name, int num_ct, + unsigned int irq_base, void __iomem *reg_base, + irq_flow_handler_t handler) +{ + struct irq_chip_generic *gc; + unsigned long sz = sizeof(*gc) + num_ct * sizeof(struct irq_chip_type); + + gc = devm_kzalloc(dev, sz, GFP_KERNEL); + if (gc) + irq_init_generic_chip(gc, name, num_ct, + irq_base, reg_base, handler); + + return gc; +} +EXPORT_SYMBOL_GPL(devm_irq_alloc_generic_chip); +#endif /* CONFIG_GENERIC_IRQ_CHIP */ -- 2.20.1